The Benefactor is an adjudicator that the party met after arriving in Calidor. He purchased the storm hydra skin for a very high price and paid for Joanna’s restoration before asking the party for assistance with a political matter.
While the party travelled to Sindolyn and fought with a pair of giants, the Benefactor used his voice to Stop all combat. When one giant fled, it died to some plants that were presumably controlled by him.
When Thelmivor attempted to use Identify on the Benefactor, he was mildly terrified by what he saw.